18070901 has 4 divisors (see below), whose sum is σ = 18079404. Its totient is φ = 18062400.

The previous prime is 18070891. The next prime is 18070963. The reversal of 18070901 is 10907081.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 17648401 + 422500 = 4201^2 + 650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18070901 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18070981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2111 + ... + 6371.

It is an arithmetic number, because the mean of its divisors is an integer number (4519851).

Almost surely, 2^18070901 is an apocalyptic number.

It is an amenable number.

18070901 is a deficient number, since it is larger than the sum of its proper divisors (8503).

18070901 is an equidigital number, since it uses as much as digits as its factorization.

18070901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8502.

The product of its (nonzero) digits is 504, while the sum is 26.

The square root of 18070901 is about 4250.9882380454. The cubic root of 18070901 is about 262.4177871039.

Adding to 18070901 its reverse (10907081), we get a palindrome (28977982).

The spelling of 18070901 in words is "eighteen million, seventy thousand, nine hundred one".